> This Act does not prohibit the use of a drone by a law enforcement agency [...] to forestall [...] the destruction of evidence
So, essentially nothing is prohibited. "Destruction of evidence" can be flushing drugs down the toilet or throwing them out a car window. The war on drugs greatly increases how many "crimes" are being committed at any given time and what is considered evidence of those crimes.
Is anything ever really prohibited (for US law enforcement)? Better yet, what are the real consequences for violation? All I ever hear is, "Okay, fine. We won't do this illegal thing anymore - you know, the thing we've been doing for years, knowing it's totally illegal. Sorry, not sorry." Without consequences for violation, there is no prohibition.
So, essentially nothing is prohibited. "Destruction of evidence" can be flushing drugs down the toilet or throwing them out a car window. The war on drugs greatly increases how many "crimes" are being committed at any given time and what is considered evidence of those crimes.